US20230310070A1 - Catheter - Google Patents
Catheter Download PDFInfo
- Publication number
- US20230310070A1 US20230310070A1 US18/186,014 US202318186014A US2023310070A1 US 20230310070 A1 US20230310070 A1 US 20230310070A1 US 202318186014 A US202318186014 A US 202318186014A US 2023310070 A1 US2023310070 A1 US 2023310070A1
- Authority
- US
- United States
- Prior art keywords
- spline
- distal end
- shape
- shaft
- splines
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000000452 restraining effect Effects 0.000 claims abstract description 53
- 230000033001 locomotion Effects 0.000 claims abstract description 13
- 239000000853 adhesive Substances 0.000 claims description 4
- 230000001070 adhesive effect Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 description 13
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 229920000098 polyolefin Polymers 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229930182556 Polyacetal Natural products 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910001000 nickel titanium Inorganic materials 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910001285 shape-memory alloy Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B18/1492—Probes or electrodes therefor having a flexible, catheter-like structure, e.g. for heart ablation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/0016—Energy applicators arranged in a two- or three dimensional array
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00053—Mechanical features of the instrument of device
- A61B2018/00214—Expandable means emitting energy, e.g. by elements carried thereon
- A61B2018/00267—Expandable means emitting energy, e.g. by elements carried thereon having a basket shaped structure
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/1206—Generators therefor
- A61B2018/1246—Generators therefor characterised by the output polarity
- A61B2018/1253—Generators therefor characterised by the output polarity monopolar
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1407—Loop
- A61B2018/141—Snare
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1467—Probes or electrodes therefor using more than two electrodes on a single probe
Definitions
- the present disclosure relates to a catheter.
- a catheter is a type of medical devices to be inserted into the body for diagnosis or treatment.
- a catheter provided with a shaft and a basket electrode assembly coupled to a distal end of the shaft has been known (for example, see Patent Document 1).
- the basket electrode assembly includes a plurality of splines.
- the basket electrode assembly is configured to change its shape from a contracted shape into an expanded shape by changing the shapes of the splines.
- the interval between the adjacent splines may become too narrow or too wide.
- the present disclosure is made in view of the foregoing circumstances, and an object of the present disclosure is to provide a catheter that changes its shape with the adjacent splines held at appropriate intervals.
- a catheter according to the present disclosure includes a shaft to be inserted into a body, a plurality of splines connected to a distal end side of the shaft, and a distal end member connected to a distal end side of the splines.
- the plurality of splines include a first spline and a second spline.
- the first spline and the second spline are located adjacent to each other and motions of the first spline and the second spline are restrained by a first restraining member.
- the catheter of the present disclosure can change its shape with splines adjacent to each other held at appropriate intervals.
- FIG. 1 is a perspective view schematically illustrating an example of a state where a portion near a distal end of a catheter of the present disclosure is changed in shape.
- FIG. 2 is a perspective view schematically illustrating another example of a state where the portion near the distal end of the catheter of the present disclosure is changed in shape.
- FIG. 3 is a perspective view of members constituting the catheter illustrated in FIG. 1 , from which splines are eliminated.
- FIG. 4 is a perspective view of members constituting the catheter illustrated in FIG. 1 , from which a distal end member is eliminated.
- FIG. 5 is an enlarged view of an S portion illustrated in FIG. 4 .
- FIG. 6 is a side view schematically illustrating an example of the structure of the portion near the distal end of the catheter of the present disclosure.
- FIG. 7 is a cross-sectional view taken along the line II-II in FIG. 6 .
- FIG. 8 is a cross-sectional view taken along the line III-III in FIG. 6 .
- FIG. 9 is a schematic diagram illustrating an example of the overall structure of the catheter of the present disclosure.
- FIG. 1 is a perspective view schematically illustrating an example of a state where a portion near a distal end of a catheter 1 of the present disclosure is changed in shape.
- FIG. 2 is a perspective view schematically illustrating another example of a state where the portion near the distal end of the catheter 1 of the present disclosure is changed in shape.
- the catheter 1 of the present disclosure includes a shaft 2 to be inserted into the body, a plurality of splines 3 connected to a distal end side of the shaft 2 , and a distal end member 4 connected to a distal end side of the splines 3 .
- the shaft 2 may be an elongated circular tubular member.
- the length of the shaft 2 is, for example, 800 mm to 1800 mm.
- the outer diameter of the shaft 2 is, for example, 2.0 mm to 5.0 mm.
- the material forming the shaft 2 may be a material having flexibility and biocompatibility.
- the shaft 2 is formed of a known resin such as polyolefin or polyamide.
- the spline 3 is a member that connects the shaft 2 and the distal end member 4 .
- the spline 3 may be a circular tubular member like the shaft 2 .
- the length of the spline 3 when extended in a linear manner is, for example, 20 mm to 50 mm.
- the outer diameter of the spline 3 is, for example, 0.5 mm to 2.0 mm.
- the material forming the spline 3 is any material having flexibility and biocompatibility.
- the spline 3 is formed of a known resin such as polyolefin or polyamide, like the shaft 2 .
- the splines 3 include at least a first spline 3 a and a second spline 3 b that are adjacent to each other.
- FIGS. 1 and 2 illustrate an example in which the number of splines 3 is six. Specifically, an example is illustrated in which the first spline 3 a is adjacent to the second spline 3 b , the second spline 3 b to a third spline 3 c , the third spline 3 c to a fourth spline 3 d , the fourth spline 3 d to a fifth spline 3 e , the fifth spline 3 e to a sixth spline 3 f , and the sixth spline 3 f to the first spline 3 a .
- the splines 3 are disposed separated from each other in a plane orthogonal to a central axis of the shaft 2 .
- the splines 3 are connected to the shaft 2 .
- a portion (proximal end portion) including a proximal end of the spline 3 is inserted into the distal end side of the shaft 2 .
- the proximal end portion of the spline 3 and the shaft 2 are joined to each other by a known joining method such as welding or bonding with an adhesive.
- the spline 3 is configured to change its shape in accordance with a shape changing operation described below. Specifically, the shape of each spline 3 is changed between an unexpanded shape (a contracted shape) in which each spline 3 is not expanded along the central axis of the shaft 2 and an expanded shape (a developed shape) in which each spline 3 is expanded along the central axis of the shaft 2 from the unexpanded shape.
- the unexpanded shape may include a “petal shape” (see FIG. 2 ) as will hereinafter be described in detail.
- examples of the expanded shape may include a “basket shape” (see FIG. 1 ) in which each spline 3 is expanded from the petal shape along the central axis of the shaft 2 .
- FIG. 3 is a perspective view of members constituting the catheter 1 illustrated in FIG. 1 , from which the splines 3 are eliminated.
- FIG. 4 is a perspective view of members constituting the catheter 1 illustrated in FIG. 1 , from which the distal end member 4 is eliminated.
- FIG. 5 is an enlarged view of the S portion illustrated in FIG. 4 . As illustrated in FIGS. 3 to 5 , motions of the first spline 3 a and the second spline 3 b are restrained by a first restraining member 6 a .
- motions of the first spline 3 a and the second spline 3 b are restrained means that when the first spline 3 a and the second spline 3 b are changed in shape, the first spline 3 a and the second spline 3 b change their shapes while holding an appropriate interval therebetween.
- the interval here is the shortest distance between the distal end side of the first spline 3 a and the distal end side of the second spline 3 b .
- the catheter 1 of the present disclosure can change its shape into a desired shape (unexpanded shape or expanded shape) such that the splines 3 adjacent to each other are held at appropriate intervals.
- the first restraining member 6 a may be of any shape, structure, and material as long as the member can restrain motions of the first spline 3 a and the second spline 3 b .
- the first restraining member 6 a is wire, for example.
- the material forming the first restraining member 6 a that is wire may be a shape-memory alloy such as a nickel-titanium alloy.
- the first restraining member 6 a may include a first end and a second end. At least a portion on the first end side of the first restraining member 6 a is located within the first spline 3 a , and at least a portion on the second end side of the first restraining member 6 a may be located within the second spline 3 b .
- the first restraining member 6 a may include a protruding portion 15 a protruding such that it is closer to the distal end of the catheter 1 than a distal end of the first spline 3 a and a distal end of the second spline 3 b are.
- At least a portion on the first end side is a continuous portion having a certain length from the first end side of the protruding portion 15 a in the first restraining member 6 a .
- At least a portion of the second end side is a continuous portion having a certain length from the second end side of the protruding portion 15 a in the first restraining member 6 a.
- the first end of the first restraining member 6 a may be located closer to a proximal end of the catheter 1 than a proximal end of the first spline 3 a is. Meanwhile, the second end of the first restraining member 6 a may be located closer to the proximal end of the catheter 1 than a proximal end of the second spline 3 b is.
- the first restraining member 6 a serves as a framework that maintains the shapes of the first spline 3 a and the second spline 3 b.
- the protruding portion 15 a may have a shape bent in a U-shape.
- the first restraining member 6 a is also changed in shape along with the spline.
- the stress generated by the change in shape is concentrated in the protruding portion 15 a .
- the protruding portion 15 a has a shape bent in a U-shape, the stress described above can be effectively relieved, and even when changing in shape is repeatedly performed, the protruding portion 15 a is less likely to break.
- the first spline 3 a and the second spline 3 b are described as an example; however, the same applies to the other splines 3 .
- motions of the adjacent splines 3 may be restrained by one restraining member 6 .
- motions of the second spline 3 b and the third spline 3 c may be restrained by a second restraining member 6 b .
- Motions of the third spline 3 c and the fourth spline 3 d may be restrained by a third restraining member 6 c .
- Motions of the fourth spline 3 d and the fifth spline 3 e may be restrained by a fourth restraining member 6 d .
- Motions of the fifth spline 3 e and the sixth spline 3 f may be restrained by a fifth restraining member 6 e .
- Motions of the sixth spline 3 f and the first spline 3 a may be restrained by a sixth restraining member 6 f.
- FIG. 6 is a side view schematically illustrating an example of the structure of the portion near the distal end of the catheter 1 of the present disclosure.
- FIG. 7 is a cross-sectional view taken along the line II-II in FIG. 6 .
- the first spline 3 a may have a multi-lumen structure.
- the first spline 3 a includes four lumens 7 ( 7 a 1 , 7 b 1 , 7 c 1 , 7 d 1 ) extending from the distal end to the proximal end along a central axis of the first spline 3 a .
- the lumens 7 a 1 , 7 b 1 are located closer to the central axis of the shaft 2 than the lumens 7 c 1 , 7 d 1 are.
- the lumens 7 b 1 , 7 c 1 are located closer to the second spline 3 b than the lumens 7 a 1 , 7 d 1 are.
- the second spline 3 b may have a multi-lumen structure like the first spline 3 a .
- the second spline 3 b includes four lumens 7 ( 7 a 2 , 7 b 2 , 7 c 2 , 7 d 2 ) extending from the distal end to the proximal end along a central axis of the second spline 3 b .
- the lumens 7 a 2 , 7 b 2 are located closer to the central axis of the shaft 2 than the lumens 7 c 2 , 7 d 2 are.
- the lumens 7 a 2 , 7 d 2 are located closer to the first spline 3 a than the lumens 7 c 2 , 7 b 2 are.
- the first end side of the first restraining member 6 a may be inserted into the lumen 7 c 1 of the first spline 3 a . Meanwhile, the second end side of the first restraining member 6 a may be inserted into the lumen 7 d 2 of the second spline 3 b . As just described, the first restraining members 6 a are inserted in the lumens 7 c 1 , 7 d 2 , located separated from the central axis side of the shaft 2 and closest to each other, of the lumens 7 in the first spline 3 a and the second spline 3 b , and thus the first spline 3 a and the second spline 3 b are held at a more appropriate interval.
- first spline 3 a the second spline 3 b , and the first restraining member 6 a are described as an example; however, the same applies to the other splines 3 and the other restraining members 6 .
- Each spline 3 may include one or more electrodes 5 as illustrated in FIG. 6 .
- the electrode 5 is a ring-shaped electrode for potential measurement or cauterization.
- the electrodes 5 included in the same spline 3 are disposed separated from each other along the longitudinal direction of the spline 3 . In this case, the intervals between the adjacent electrodes 5 may be uniform or may be different.
- the number of electrodes 5 included in each of the splines 3 may be the same or may be different.
- the electrode 5 is formed of a material having conductivity.
- the electrode 5 is formed of a metal which has a good electrical conductivity, such as aluminum (Al), copper (Cu), stainless steel, gold (Au), or platinum (Pt).
- the length of the electrode 5 is, for example, 0.5 mm to 2.0 mm.
- the outer diameter of the electrode 5 is equivalent to the outer diameter of the spline 3 , and is, for example, 0.5 mm to 1.6 mm.
- a conductive wire is individually and electrically connected to each of the electrodes 5 .
- the conductive wire passes through the spline 3 , the shaft 2 , and a handle 8 described below to be connected via the handle 8 to an external power supply device.
- the conductive wires connected to the respective electrodes 5 of the first spline 3 a pass through the lumen 7 a 1 or the lumen 7 b 1 of the first spline 3 a while being electrically isolated from each other. Note that the same applies to the splines 3 other than the first spline 3 a.
- the distal end member 4 may cover a portion (distal end portion) including the distal end of the first spline 3 a , a portion (distal end portion) including the distal end of the second spline 3 b , and the protruding portion 15 a of the first restraining member 6 a .
- the distal end portion of the first spline 3 a , the distal end portion of the second spline 3 b , and the protruding portion 15 a of the first restraining member 6 a may be covered by the distal end member 4 .
- the distal end member 4 may have any shape, and has a cap shape, for example.
- the distal end member 4 may be formed of any material, and is formed of a known resin such as nylon, nylon elastomer, or polycarbonate, or a known metal such as stainless steel. Note that the distal end member 4 may cover all of the distal end portions of the splines 3 and the protruding portions 15 of the restraining members 6 .
- FIG. 8 is a cross-sectional view taken along the line III-III in FIG. 6 .
- a wall portion forming an inner surface of the distal end member 4 may have a first recess portion 9 a and a second recess portion 9 b that are located adjacent to each other.
- At least a portion of the distal end portion of the first spline 3 a may be located in the first recess portion 9 a
- at least a portion of the distal end portion of the second spline 3 b may be located in the second recess portion 9 b .
- the distal end portion of the first spline 3 a is located in the first recess portion 9 a means that in plan view of the lower surface of the distal end member 4 , a region of the first recess portion 9 a includes a portion overlapped by the first spline 3 a .
- the distal end portion of the second spline 3 b is located in the second recess portion 9 b means that in plan view of the lower surface of the distal end member 4 , a region of the second recess portion 9 a includes a portion overlapped by the second spline 3 b .
- the distal end portion of the first spline 3 a and the distal end portion of the second spline 3 b can be prevented from becoming misaligned, by the first recess portion 9 a and the second recess portion 9 b.
- the shape of the first recess portion 9 a and the second recess portion 9 b is, for example, a semicircle in plan view of the lower surface of the distal end member 4 .
- the wall portion forming the first recess portion 9 a may be in contact with but need not be in contact with the first spline 3 a .
- the wall portion forming the second recess portion 9 b may be in contact with but need not be in contact with the second spline 3 b .
- FIG. 8 illustrates an example in which the wall portion forming the inner surface of the distal end member 4 has six recess portions 9 .
- the wall portion forming the inner surface of the distal end member 4 may have the recess portions 9 corresponding to the respective splines 3 .
- the interior of the distal end member 4 may be filled with an adhesive.
- the first spline 3 a , the second spline 3 b , and the first restraining member 6 a are firmly joined to each other by the adhesive. Therefore, the first spline 3 a and the second spline 3 b are held at a more appropriate interval.
- the distal end member 4 may include a bundling member 10 that bundles the protruding portion 15 a of the first restraining member 6 a .
- bundling the protruding portion 15 a means that bundling the protruding portion 15 a such that the protruding portion 15 a does not move in a planar direction orthogonal to the central axis of the shaft 2 .
- the twisting of the first restraining member 6 a is suppressed by the bundling member 10 , and thus the first spline 3 a and the second spline 3 b can be changed in shape via the first restraining member 6 a effectively in conjunction with each other.
- the bundling member 10 may bundle the protruding portions 15 of all of the restraining members 6 .
- the bundling member 10 may be of any shape, structure, and material as long as the bundling member 10 can bundle the protruding portion 15 a .
- the shape of the bundling member 10 is a plate including a first surface (top surface) and a second surface (lower surface) that is the back surface of the first surface.
- the second surface faces a distal end surface of the first spline 3 a and a distal end surface of the second spline 3 b .
- the bundling member 10 is provided with a through-hole 16 a penetrating from the first surface to the second surface.
- the protruding portion 15 a of the first restraining member 6 a is inserted into the through-hole 16 a .
- a third surface (side surface) that connects the first surface and the second surface of the bundling member 10 may have any shape that corresponds to the wall portion forming the inner surface of the distal end member 4 .
- the third surface may have a shape that includes protrusion portions corresponding to the respective recess portions 9 of the distal end member 4 .
- the material forming the bundling member 10 may be a material having high rigidity.
- the bundling member 10 is formed of a known metal such as stainless steel. Note that the bundling member 10 may be provided with through-holes 16 corresponding to the protruding portions 15 of the respective restraining members 6 .
- the through-hole 16 a may have any shape as long as the protruding portion 15 a of the first restraining member 6 a can be inserted into the through-hole 16 a .
- the shape of the through-hole 16 a is an elliptical shape in plan view seen from the first surface side of the bundling member 10 . Note that the same may apply to the other through-holes 16 .
- FIG. 9 is a schematic diagram illustrating an example of the overall structure of the catheter 1 of the present disclosure.
- the catheter 1 may be provided with the handle 8 connected to the proximal end side of the shaft 2 .
- the handle 8 is a portion that an operator (physician) grips (holds) when using the catheter 1 .
- the handle 8 may include a handle body 11 mounted on the proximal end side of the shaft 2 , a rotational operation portion 12 , and a slide member 13 .
- the handle body 11 corresponds to a portion that is actually held by the operator.
- the handle body 11 may have any shape.
- the handle body 11 has a shape extending along the central axis of the shaft 2 , for example.
- the handle body 11 is formed of, for example, a known resin such as polycarbonate, polyacetal, or ABS.
- the rotational operation portion 12 is a portion that is operated (rotated) when a portion near the distal end of the shaft 2 is bent (warped) in both directions. Proximal ends of a pair of pull wires are fixed to the rotational operation portion 12 in the handle body 11 . Distal ends of the pair of pull wires pass through the handle body 11 and the shaft 2 to be fixed to the distal end side of the shaft 2 . Thus, when the rotational operation portion 12 is operated (rotated), the pull wires are pulled toward the proximal end side, and the distal end side of the shaft 2 to which the distal ends of the pull wires are fixed is bent (warped).
- the slide member 13 is a portion that is changed in shape (slid) by the operator at the time of changing the shape of the spline 3 between the unexpanded shape (contracted shape) and the expanded shape (developed shape) that are described above.
- the slide member 13 is slidable along the central axis of the shaft 2 in the handle body 11 .
- a proximal end of a shape changing member 14 is fixed to the slide member 13 .
- a distal end of the shape changing member 14 passes through the shaft 2 from the inside of the handle body 11 to be fixed to the inside of the distal end member 4 .
- the slide member 13 is movable to any position in the handle body 11 along the central axis of the shaft 2 . Therefore, in accordance with the position of the slide member 13 , the shape of the spline 3 can be changed to the aforementioned unexpanded shape (contracted shape), the aforementioned expanded shape (developed shape), or any intermediate shape between the unexpanded shape and the expanded shape.
- the shape changing member 14 may be of any shape, structure, and material as long as the shape changing member 14 is an elongated member.
- the shape changing member 14 is wire thicker than the restraining member 6 .
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Surgery (AREA)
- Public Health (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Biomedical Technology (AREA)
- Otolaryngology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Plasma & Fusion (AREA)
- Physics & Mathematics (AREA)
- Cardiology (AREA)
- Biophysics (AREA)
- Pulmonology (AREA)
- Anesthesiology (AREA)
- Hematology (AREA)
- Surgical Instruments (AREA)
- Media Introduction/Drainage Providing Device (AREA)
Abstract
Provided is a catheter in which a spline changes its shape into an intended shape. A catheter includes a shaft to be inserted into the body, a plurality of splines connected to the distal end side of the shaft, and a distal end member connected to the distal end side of the splines. The plurality of splines include a first spline and a second spline. The first spline and the second spline are located adjacent to each other and their motions are restrained by a first restraining member.
Description
- The present disclosure relates to a catheter.
- A catheter is a type of medical devices to be inserted into the body for diagnosis or treatment. As an example, a catheter provided with a shaft and a basket electrode assembly coupled to a distal end of the shaft has been known (for example, see Patent Document 1). Here, the basket electrode assembly includes a plurality of splines. In addition, the basket electrode assembly is configured to change its shape from a contracted shape into an expanded shape by changing the shapes of the splines.
-
-
- Patent Document 1: JP 2016-507349 T
- When the catheter described above is changed in shape with the splines in contact with a body tissue, the interval between the adjacent splines may become too narrow or too wide.
- The present disclosure is made in view of the foregoing circumstances, and an object of the present disclosure is to provide a catheter that changes its shape with the adjacent splines held at appropriate intervals.
- A catheter according to the present disclosure includes a shaft to be inserted into a body, a plurality of splines connected to a distal end side of the shaft, and a distal end member connected to a distal end side of the splines. The plurality of splines include a first spline and a second spline. The first spline and the second spline are located adjacent to each other and motions of the first spline and the second spline are restrained by a first restraining member.
- Any combination of the above components and conversions of representation of the present disclosure between a method, a device, a system, and the like are also effective as aspects of the present disclosure.
- The catheter of the present disclosure can change its shape with splines adjacent to each other held at appropriate intervals.
-
FIG. 1 is a perspective view schematically illustrating an example of a state where a portion near a distal end of a catheter of the present disclosure is changed in shape. -
FIG. 2 is a perspective view schematically illustrating another example of a state where the portion near the distal end of the catheter of the present disclosure is changed in shape. -
FIG. 3 is a perspective view of members constituting the catheter illustrated inFIG. 1 , from which splines are eliminated. -
FIG. 4 is a perspective view of members constituting the catheter illustrated inFIG. 1 , from which a distal end member is eliminated. -
FIG. 5 is an enlarged view of an S portion illustrated inFIG. 4 . -
FIG. 6 is a side view schematically illustrating an example of the structure of the portion near the distal end of the catheter of the present disclosure. -
FIG. 7 is a cross-sectional view taken along the line II-II inFIG. 6 . -
FIG. 8 is a cross-sectional view taken along the line III-III inFIG. 6 . -
FIG. 9 is a schematic diagram illustrating an example of the overall structure of the catheter of the present disclosure. - The present disclosure will be described below based on preferred embodiments with reference to the drawings. The embodiments are illustrative and are not intended to limit the present disclosure. Not all features or combinations of the features described in the embodiments are essential to the present disclosure. The same or similar components, members, and processing operations illustrated in the drawings are denoted by the same reference numerals, and redundant descriptions are omitted as appropriate. The scales and shapes of the parts illustrated in each drawing are set for convenience to facilitate the explanation and should not be construed in a limited manner unless otherwise specified. When the terms “first”, “second”, and the like are used in the specification or claims, these terms do not mean any order or importance unless otherwise specified and are used for distinguishing a configuration from other configurations. Furthermore, some of the members that are not critical in describing the embodiments in the drawings are omitted in illustration.
-
FIG. 1 is a perspective view schematically illustrating an example of a state where a portion near a distal end of acatheter 1 of the present disclosure is changed in shape.FIG. 2 is a perspective view schematically illustrating another example of a state where the portion near the distal end of thecatheter 1 of the present disclosure is changed in shape. As illustrated inFIGS. 1 and 2 , thecatheter 1 of the present disclosure includes ashaft 2 to be inserted into the body, a plurality of splines 3 connected to a distal end side of theshaft 2, and a distal end member 4 connected to a distal end side of the splines 3. - The
shaft 2 may be an elongated circular tubular member. The length of theshaft 2 is, for example, 800 mm to 1800 mm. The outer diameter of theshaft 2 is, for example, 2.0 mm to 5.0 mm. The material forming theshaft 2 may be a material having flexibility and biocompatibility. For example, theshaft 2 is formed of a known resin such as polyolefin or polyamide. - The spline 3 is a member that connects the
shaft 2 and the distal end member 4. The spline 3 may be a circular tubular member like theshaft 2. The length of the spline 3 when extended in a linear manner is, for example, 20 mm to 50 mm. The outer diameter of the spline 3 is, for example, 0.5 mm to 2.0 mm. The material forming the spline 3 is any material having flexibility and biocompatibility. For example, the spline 3 is formed of a known resin such as polyolefin or polyamide, like theshaft 2. - The splines 3 include at least a
first spline 3 a and asecond spline 3 b that are adjacent to each other.FIGS. 1 and 2 illustrate an example in which the number of splines 3 is six. Specifically, an example is illustrated in which thefirst spline 3 a is adjacent to thesecond spline 3 b, thesecond spline 3 b to athird spline 3 c, thethird spline 3 c to afourth spline 3 d, thefourth spline 3 d to afifth spline 3 e, thefifth spline 3 e to asixth spline 3 f, and thesixth spline 3 f to thefirst spline 3 a. The splines 3 are disposed separated from each other in a plane orthogonal to a central axis of theshaft 2. - The splines 3 are connected to the
shaft 2. For example, a portion (proximal end portion) including a proximal end of the spline 3 is inserted into the distal end side of theshaft 2. The proximal end portion of the spline 3 and theshaft 2 are joined to each other by a known joining method such as welding or bonding with an adhesive. - The spline 3 is configured to change its shape in accordance with a shape changing operation described below. Specifically, the shape of each spline 3 is changed between an unexpanded shape (a contracted shape) in which each spline 3 is not expanded along the central axis of the
shaft 2 and an expanded shape (a developed shape) in which each spline 3 is expanded along the central axis of theshaft 2 from the unexpanded shape. Examples of the unexpanded shape may include a “petal shape” (seeFIG. 2 ) as will hereinafter be described in detail. Meanwhile, examples of the expanded shape may include a “basket shape” (seeFIG. 1 ) in which each spline 3 is expanded from the petal shape along the central axis of theshaft 2. -
FIG. 3 is a perspective view of members constituting thecatheter 1 illustrated inFIG. 1 , from which the splines 3 are eliminated.FIG. 4 is a perspective view of members constituting thecatheter 1 illustrated inFIG. 1 , from which the distal end member 4 is eliminated.FIG. 5 is an enlarged view of the S portion illustrated inFIG. 4 . As illustrated inFIGS. 3 to 5 , motions of thefirst spline 3 a and thesecond spline 3 b are restrained by afirst restraining member 6 a. Here, that motions of thefirst spline 3 a and thesecond spline 3 b are restrained means that when thefirst spline 3 a and thesecond spline 3 b are changed in shape, thefirst spline 3 a and thesecond spline 3 b change their shapes while holding an appropriate interval therebetween. Note that the interval here is the shortest distance between the distal end side of thefirst spline 3 a and the distal end side of thesecond spline 3 b. Thus, even if the shape changing operation is performed in a state where thefirst spline 3 a is in contact with a body tissue, thefirst spline 3 a and thesecond spline 3 b change its shape while holding an appropriate interval therebetween via the first restrainingmember 6 a. Since satisfying such a configuration, thecatheter 1 of the present disclosure can change its shape into a desired shape (unexpanded shape or expanded shape) such that the splines 3 adjacent to each other are held at appropriate intervals. - The
first restraining member 6 a may be of any shape, structure, and material as long as the member can restrain motions of thefirst spline 3 a and thesecond spline 3 b. Thefirst restraining member 6 a is wire, for example. The material forming the first restrainingmember 6 a that is wire may be a shape-memory alloy such as a nickel-titanium alloy. - The
first restraining member 6 a may include a first end and a second end. At least a portion on the first end side of the first restrainingmember 6 a is located within thefirst spline 3 a, and at least a portion on the second end side of the first restrainingmember 6 a may be located within thesecond spline 3 b. Thefirst restraining member 6 a may include a protrudingportion 15 a protruding such that it is closer to the distal end of thecatheter 1 than a distal end of thefirst spline 3 a and a distal end of thesecond spline 3 b are. Here, at least a portion on the first end side is a continuous portion having a certain length from the first end side of the protrudingportion 15 a in the first restrainingmember 6 a. At least a portion of the second end side is a continuous portion having a certain length from the second end side of the protrudingportion 15 a in the first restrainingmember 6 a. - The first end of the first restraining
member 6 a may be located closer to a proximal end of thecatheter 1 than a proximal end of thefirst spline 3 a is. Meanwhile, the second end of the first restrainingmember 6 a may be located closer to the proximal end of thecatheter 1 than a proximal end of thesecond spline 3 b is. When such a configuration is satisfied, the first restrainingmember 6 a serves as a framework that maintains the shapes of thefirst spline 3 a and thesecond spline 3 b. - In a case where the first restraining
member 6 a is wire, the protrudingportion 15 a may have a shape bent in a U-shape. When thefirst spline 3 a or thesecond spline 3 b is changed in shape, the first restrainingmember 6 a is also changed in shape along with the spline. At this time, the stress generated by the change in shape is concentrated in the protrudingportion 15 a. When the protrudingportion 15 a has a shape bent in a U-shape, the stress described above can be effectively relieved, and even when changing in shape is repeatedly performed, the protrudingportion 15 a is less likely to break. - In the embodiment described above, the
first spline 3 a and thesecond spline 3 b are described as an example; however, the same applies to the other splines 3. In other words, motions of the adjacent splines 3 may be restrained by one restraining member 6. Specifically, motions of thesecond spline 3 b and thethird spline 3 c may be restrained by asecond restraining member 6 b. Motions of thethird spline 3 c and thefourth spline 3 d may be restrained by a third restraining member 6 c. Motions of thefourth spline 3 d and thefifth spline 3 e may be restrained by afourth restraining member 6 d. Motions of thefifth spline 3 e and thesixth spline 3 f may be restrained by a fifth restrainingmember 6 e. Motions of thesixth spline 3 f and thefirst spline 3 a may be restrained by a sixth restrainingmember 6 f. -
FIG. 6 is a side view schematically illustrating an example of the structure of the portion near the distal end of thecatheter 1 of the present disclosure.FIG. 7 is a cross-sectional view taken along the line II-II inFIG. 6 . As illustrated inFIG. 7 , thefirst spline 3 a may have a multi-lumen structure. Specifically, thefirst spline 3 a includes four lumens 7 (7 a 1, 7b 1, 7c 1, 7 d 1) extending from the distal end to the proximal end along a central axis of thefirst spline 3 a. Here, the lumens 7 a 1, 7b 1 are located closer to the central axis of theshaft 2 than the lumens 7c 1, 7d 1 are. The lumens 7b 1, 7c 1 are located closer to thesecond spline 3 b than the lumens 7 a 1, 7d 1 are. - The
second spline 3 b may have a multi-lumen structure like thefirst spline 3 a. Specifically, thesecond spline 3 b includes four lumens 7 (7 a 2, 7b 2, 7c 2, 7 d 2) extending from the distal end to the proximal end along a central axis of thesecond spline 3 b. Here, the lumens 7 a 2, 7b 2 are located closer to the central axis of theshaft 2 than the lumens 7c 2, 7d 2 are. The lumens 7 a 2, 7d 2 are located closer to thefirst spline 3 a than the lumens 7c 2, 7b 2 are. - The first end side of the first restraining
member 6 a may be inserted into the lumen 7c 1 of thefirst spline 3 a. Meanwhile, the second end side of the first restrainingmember 6 a may be inserted into the lumen 7d 2 of thesecond spline 3 b. As just described, thefirst restraining members 6 a are inserted in the lumens 7c 1, 7d 2, located separated from the central axis side of theshaft 2 and closest to each other, of the lumens 7 in thefirst spline 3 a and thesecond spline 3 b, and thus thefirst spline 3 a and thesecond spline 3 b are held at a more appropriate interval. - In the embodiment described above, the
first spline 3 a, thesecond spline 3 b, and the first restrainingmember 6 a are described as an example; however, the same applies to the other splines 3 and the other restraining members 6. - Each spline 3 may include one or
more electrodes 5 as illustrated inFIG. 6 . Theelectrode 5 is a ring-shaped electrode for potential measurement or cauterization. Theelectrodes 5 included in the same spline 3 are disposed separated from each other along the longitudinal direction of the spline 3. In this case, the intervals between theadjacent electrodes 5 may be uniform or may be different. The number ofelectrodes 5 included in each of the splines 3 may be the same or may be different. - The
electrode 5 is formed of a material having conductivity. For example, theelectrode 5 is formed of a metal which has a good electrical conductivity, such as aluminum (Al), copper (Cu), stainless steel, gold (Au), or platinum (Pt). The length of theelectrode 5 is, for example, 0.5 mm to 2.0 mm. The outer diameter of theelectrode 5 is equivalent to the outer diameter of the spline 3, and is, for example, 0.5 mm to 1.6 mm. - A conductive wire is individually and electrically connected to each of the
electrodes 5. The conductive wire passes through the spline 3, theshaft 2, and ahandle 8 described below to be connected via thehandle 8 to an external power supply device. For example, the conductive wires connected to therespective electrodes 5 of thefirst spline 3 a pass through the lumen 7 a 1 or the lumen 7b 1 of thefirst spline 3 a while being electrically isolated from each other. Note that the same applies to the splines 3 other than thefirst spline 3 a. - As illustrated in
FIGS. 2 and 4 , the distal end member 4 may cover a portion (distal end portion) including the distal end of thefirst spline 3 a, a portion (distal end portion) including the distal end of thesecond spline 3 b, and the protrudingportion 15 a of the first restrainingmember 6 a. In other words, the distal end portion of thefirst spline 3 a, the distal end portion of thesecond spline 3 b, and the protrudingportion 15 a of the first restrainingmember 6 a may be covered by the distal end member 4. The distal end member 4 may have any shape, and has a cap shape, for example. The distal end member 4 may be formed of any material, and is formed of a known resin such as nylon, nylon elastomer, or polycarbonate, or a known metal such as stainless steel. Note that the distal end member 4 may cover all of the distal end portions of the splines 3 and the protruding portions 15 of the restraining members 6. -
FIG. 8 is a cross-sectional view taken along the line III-III inFIG. 6 . As illustrated inFIG. 8 , in plan view of a lower surface of the distal end member 4, a wall portion forming an inner surface of the distal end member 4 may have afirst recess portion 9 a and asecond recess portion 9 b that are located adjacent to each other. At least a portion of the distal end portion of thefirst spline 3 a may be located in thefirst recess portion 9 a, and at least a portion of the distal end portion of thesecond spline 3 b may be located in thesecond recess portion 9 b. Here, that at least a portion of the distal end portion of thefirst spline 3 a is located in thefirst recess portion 9 a means that in plan view of the lower surface of the distal end member 4, a region of thefirst recess portion 9 a includes a portion overlapped by thefirst spline 3 a. Meanwhile, that at least a portion of the distal end portion of thesecond spline 3 b is located in thesecond recess portion 9 b means that in plan view of the lower surface of the distal end member 4, a region of thesecond recess portion 9 a includes a portion overlapped by thesecond spline 3 b. In a case where such a configuration is satisfied, when thefirst spline 3 a and thesecond spline 3 b are changed in shape, the distal end portion of thefirst spline 3 a and the distal end portion of thesecond spline 3 b can be prevented from becoming misaligned, by thefirst recess portion 9 a and thesecond recess portion 9 b. - The shape of the
first recess portion 9 a and thesecond recess portion 9 b is, for example, a semicircle in plan view of the lower surface of the distal end member 4. The wall portion forming thefirst recess portion 9 a may be in contact with but need not be in contact with thefirst spline 3 a. Similarly, the wall portion forming thesecond recess portion 9 b may be in contact with but need not be in contact with thesecond spline 3 b. Note thatFIG. 8 illustrates an example in which the wall portion forming the inner surface of the distal end member 4 has six recess portions 9. As just described, the wall portion forming the inner surface of the distal end member 4 may have the recess portions 9 corresponding to the respective splines 3. - The interior of the distal end member 4 may be filled with an adhesive. When such a configuration is satisfied, the
first spline 3 a, thesecond spline 3 b, and the first restrainingmember 6 a are firmly joined to each other by the adhesive. Therefore, thefirst spline 3 a and thesecond spline 3 b are held at a more appropriate interval. - As illustrated in
FIG. 5 , the distal end member 4 may include a bundlingmember 10 that bundles the protrudingportion 15 a of the first restrainingmember 6 a. Here, that bundling the protrudingportion 15 a means that bundling the protrudingportion 15 a such that the protrudingportion 15 a does not move in a planar direction orthogonal to the central axis of theshaft 2. When such a configuration is satisfied, the twisting of the first restrainingmember 6 a is suppressed by the bundlingmember 10, and thus thefirst spline 3 a and thesecond spline 3 b can be changed in shape via the first restrainingmember 6 a effectively in conjunction with each other. Note that the bundlingmember 10 may bundle the protruding portions 15 of all of the restraining members 6. - The bundling
member 10 may be of any shape, structure, and material as long as the bundlingmember 10 can bundle the protrudingportion 15 a. For example, the shape of the bundlingmember 10 is a plate including a first surface (top surface) and a second surface (lower surface) that is the back surface of the first surface. The second surface faces a distal end surface of thefirst spline 3 a and a distal end surface of thesecond spline 3 b. The bundlingmember 10 is provided with a through-hole 16 a penetrating from the first surface to the second surface. The protrudingportion 15 a of the first restrainingmember 6 a is inserted into the through-hole 16 a. A third surface (side surface) that connects the first surface and the second surface of the bundlingmember 10 may have any shape that corresponds to the wall portion forming the inner surface of the distal end member 4. Specifically, the third surface may have a shape that includes protrusion portions corresponding to the respective recess portions 9 of the distal end member 4. The material forming the bundlingmember 10 may be a material having high rigidity. For example, the bundlingmember 10 is formed of a known metal such as stainless steel. Note that the bundlingmember 10 may be provided with through-holes 16 corresponding to the protruding portions 15 of the respective restraining members 6. - The through-
hole 16 a may have any shape as long as the protrudingportion 15 a of the first restrainingmember 6 a can be inserted into the through-hole 16 a. For example, the shape of the through-hole 16 a is an elliptical shape in plan view seen from the first surface side of the bundlingmember 10. Note that the same may apply to the other through-holes 16. -
FIG. 9 is a schematic diagram illustrating an example of the overall structure of thecatheter 1 of the present disclosure. As illustrated inFIG. 9 , thecatheter 1 may be provided with thehandle 8 connected to the proximal end side of theshaft 2. Thehandle 8 is a portion that an operator (physician) grips (holds) when using thecatheter 1. Thehandle 8 may include ahandle body 11 mounted on the proximal end side of theshaft 2, arotational operation portion 12, and aslide member 13. - The
handle body 11 corresponds to a portion that is actually held by the operator. Thehandle body 11 may have any shape. Thehandle body 11 has a shape extending along the central axis of theshaft 2, for example. In addition, thehandle body 11 is formed of, for example, a known resin such as polycarbonate, polyacetal, or ABS. - The
rotational operation portion 12 is a portion that is operated (rotated) when a portion near the distal end of theshaft 2 is bent (warped) in both directions. Proximal ends of a pair of pull wires are fixed to therotational operation portion 12 in thehandle body 11. Distal ends of the pair of pull wires pass through thehandle body 11 and theshaft 2 to be fixed to the distal end side of theshaft 2. Thus, when therotational operation portion 12 is operated (rotated), the pull wires are pulled toward the proximal end side, and the distal end side of theshaft 2 to which the distal ends of the pull wires are fixed is bent (warped). - The
slide member 13 is a portion that is changed in shape (slid) by the operator at the time of changing the shape of the spline 3 between the unexpanded shape (contracted shape) and the expanded shape (developed shape) that are described above. Theslide member 13 is slidable along the central axis of theshaft 2 in thehandle body 11. - A proximal end of a
shape changing member 14 is fixed to theslide member 13. A distal end of theshape changing member 14 passes through theshaft 2 from the inside of thehandle body 11 to be fixed to the inside of the distal end member 4. Theslide member 13 is movable to any position in thehandle body 11 along the central axis of theshaft 2. Therefore, in accordance with the position of theslide member 13, the shape of the spline 3 can be changed to the aforementioned unexpanded shape (contracted shape), the aforementioned expanded shape (developed shape), or any intermediate shape between the unexpanded shape and the expanded shape. - The
shape changing member 14 may be of any shape, structure, and material as long as theshape changing member 14 is an elongated member. For example, theshape changing member 14 is wire thicker than the restraining member 6. - The embodiment of the present disclosure has been described in detail. The embodiment described above is merely a specific example for carrying out the present disclosure. The content of the embodiment is not intended to limit the technical scope of the present disclosure. Many design changes such as changes, additions, and deletions of components can be made in the scope that does not depart from the spirit of the present disclosure specified in the claims. A new embodiment with design changes has effects of combined embodiments and variations thereof. Any combination of components included in each embodiment is also effective as an aspect of the present disclosure. Hatching in sections of the drawings does not limit the material of a hatched object.
-
-
- 1: Catheter
- 2: Shaft
- 3, 3 a, 3 b, 3 c, 3 d, 3 e, 3 f: Spline
- 4: Distal end member
- 5: Electrode
- 6, 6 a, 6 b, 6 c, 6 d, 6 e, 6 f: Restraining member
- 7, 7 a 1, 7
b 1, 7c 1, 7d 1, 7 a 2, 7b 2, 7c 2, 7 d 2: Lumen - 8: Handle
- 9, 9 a, 9 b: Recess portion
- 10: Bundling member
- 11: Handle body
- 12: Rotational operation portion
- 13: Slide member
- 14: Shape changing member
- 15, 15 a, 15 b, 15 c, 15 d, 15 e, 15 f: Protruding portion
- 16, 16 a: Through-hole
Claims (10)
1. A catheter comprising:
a shaft to be inserted into a body;
a plurality of splines connected to a distal end side of the shaft; and
a distal end member connected to a distal end side of the splines, wherein
the plurality of splines include a first spline and a second spline, and
the first spline and the second spline are located adjacent to each other and motions of the first spline and the second spline are restrained by a first restraining member.
2. The catheter according to claim 1 , wherein
the first restraining member includes a first end and a second end,
at least a portion on the first end side of the first restraining member is located within the first spline,
at least a portion on the second end side of the first restraining member is located within the second spline, and
the first restraining member includes a protruding portion protruding such that the protruding portion is closer to a distal end of the catheter than a distal end of the first spline and a distal end of the second spline are.
3. The catheter according to claim 2 , wherein the distal end member covers a distal end portion of the first spline, a distal end portion of the second spline, and the protruding portion of the first restraining member.
4. The catheter according to claim 3 , wherein
in plan view of a lower surface of the distal end member, a wall portion forming an inner surface of the distal end member includes a first recess portion and a second recess that are located adjacent to each other,
at least a portion of the distal end portion of the first spline is located in the first recess portion, and
at least a portion of the distal end portion of the second spline is located in the second recess portion.
5. The catheter according to claim 4 , wherein an interior of the distal end member is filled with an adhesive.
6. The catheter according to claim 3 , wherein the distal end member includes a bundling member bundling the protruding portion of the first restraining member.
7. The catheter according to claim 6 , wherein
the bundling member has a plate shape including a first surface and a second surface that is a back surface of the first surface,
the second surface faces a distal end surface of the first spline and a distal end surface of the second spline, and
the bundling member is provided with a through-hole which penetrates from the first surface to the second surface and into which the protruding portion of the first restraining member is inserted.
8. The catheter according to claim 1 , wherein the first restraining member is wire.
9. The catheter according to claim 1 , wherein the first restraining member is provided separately from the distal end member and the shaft.
10. A catheter comprising:
a shaft to be inserted into a body;
a plurality of splines connected to a distal end side of the shaft; and
a distal end member connected to a distal end side of the splines, wherein
motions of the splines adjacent to each other are restrained by one restraining member.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2022-052724 | 2022-03-29 | ||
JP2022052724A JP7420854B2 (en) | 2022-03-29 | 2022-03-29 | catheter |
Publications (1)
Publication Number | Publication Date |
---|---|
US20230310070A1 true US20230310070A1 (en) | 2023-10-05 |
Family
ID=88019119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US18/186,014 Pending US20230310070A1 (en) | 2022-03-29 | 2023-03-17 | Catheter |
Country Status (4)
Country | Link |
---|---|
US (1) | US20230310070A1 (en) |
JP (2) | JP7420854B2 (en) |
CN (1) | CN116889461A (en) |
DE (1) | DE102023202417A1 (en) |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6500174B1 (en) | 1997-07-08 | 2002-12-31 | Atrionix, Inc. | Circumferential ablation device assembly and methods of use and manufacture providing an ablative circumferential band along an expandable member |
WO2004112629A1 (en) | 2003-06-20 | 2004-12-29 | Curon Medical, Inc. | Devices for treating tissues of the body |
US9232997B2 (en) | 2006-11-07 | 2016-01-12 | Corvia Medical, Inc. | Devices and methods for retrievable intra-atrial implants |
US8825130B2 (en) | 2011-12-30 | 2014-09-02 | St. Jude Medical, Atrial Fibrillation Division, Inc. | Electrode support structure assemblies |
US9408662B2 (en) | 2012-05-07 | 2016-08-09 | Cook Medical Technologies Llc | Sphincterotome having expandable tines |
US9474486B2 (en) | 2013-03-08 | 2016-10-25 | St. Jude Medical, Atrial Fibrillation Division, Inc. | Basket for a multi-electrode array catheter |
US10575743B2 (en) | 2013-04-11 | 2020-03-03 | Biosense Webster (Israel) Ltd. | High electrode density basket catheter |
US9907610B2 (en) | 2015-05-07 | 2018-03-06 | Biosense Webster (Israel) Ltd. | Spring-loaded balloon |
US10172673B2 (en) | 2016-01-05 | 2019-01-08 | Farapulse, Inc. | Systems devices, and methods for delivery of pulsed electric field ablative energy to endocardial tissue |
US11246534B2 (en) | 2017-01-23 | 2022-02-15 | Biosense Webster (Israel) Ltd. | Basket catheter made from flexible circuit board with mechanical strengthening |
CN117958829A (en) | 2018-03-13 | 2024-05-03 | 圣犹达医疗用品心脏病学部门有限公司 | Variable density mapping catheter |
-
2022
- 2022-03-29 JP JP2022052724A patent/JP7420854B2/en active Active
-
2023
- 2023-03-09 CN CN202310221390.4A patent/CN116889461A/en active Pending
- 2023-03-16 DE DE102023202417.9A patent/DE102023202417A1/en active Pending
- 2023-03-17 US US18/186,014 patent/US20230310070A1/en active Pending
- 2023-12-20 JP JP2023214610A patent/JP2024027137A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
JP7420854B2 (en) | 2024-01-23 |
DE102023202417A1 (en) | 2023-10-05 |
JP2023145853A (en) | 2023-10-12 |
CN116889461A (en) | 2023-10-17 |
JP2024027137A (en) | 2024-02-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101455493B1 (en) | Catheter | |
JP4362536B2 (en) | catheter | |
US20190001143A1 (en) | Intracardiac defibrillation catheter | |
WO2013088840A1 (en) | Catheter having distal end capable of being deflected by operation | |
CN111683716B (en) | Catheter and method of manufacturing the same | |
WO2011121931A2 (en) | Catheter | |
JP6456315B2 (en) | Electrode catheter | |
US20230310070A1 (en) | Catheter | |
JP5174542B2 (en) | catheter | |
JP5360945B1 (en) | Electrode catheter and method for producing the same | |
JP6529770B2 (en) | Electrode catheter, manufacturing method of electrode catheter | |
WO2014196249A1 (en) | Catheter having bendable tip | |
JP2016137020A (en) | Electrode catheter and manufacturing method of electrode catheter | |
JP2015188569A (en) | Tip-deflectable steerable catheter | |
KR101953486B1 (en) | Catheter | |
JP6200140B2 (en) | Electrode catheter | |
WO2021220847A1 (en) | Catheter for cardiac potential measurement | |
JP5729778B2 (en) | Electrode catheter | |
JP2020110437A (en) | Catheter production method and catheter | |
JP2023068574A (en) | electrode catheter | |
JP5432932B2 (en) | Electrode catheter | |
JP2023068575A (en) | Production method of electrode catheter | |
JP2023068572A (en) | Electrode catheter and production method of electrode catheter | |
JP5265589B2 (en) | Electrode catheter | |
JP2014144223A (en) | Catheter with deflectable tip |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: JAPAN LIFELINE CO., LTD., JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SAKAKI, KOHEI;KATO, MAKOTO;ISHIDA, RYO;REEL/FRAME:063132/0951 Effective date: 20221226 |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: DOCKETED NEW CASE - READY FOR EXAMINATION |